Time-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography

Abstract Biofouling on a membrane leads to significant performance decrease in filtration processes. In this study, an optical coherence tomography (OCT) was used to perform a time-resolved analysis of dynamic biofouling development on a submerged membrane under continuous operation. A real-time cha...

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Autores principales: Luca Fortunato, Sanghyun Jeong, TorOve Leiknes
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
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Acceso en línea:https://doaj.org/article/6dc1eae0234f4013830b8b0ba8a73c25
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spelling oai:doaj.org-article:6dc1eae0234f4013830b8b0ba8a73c252021-12-02T15:05:57ZTime-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography10.1038/s41598-017-00051-92045-2322https://doaj.org/article/6dc1eae0234f4013830b8b0ba8a73c252017-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00051-9https://doaj.org/toc/2045-2322Abstract Biofouling on a membrane leads to significant performance decrease in filtration processes. In this study, an optical coherence tomography (OCT) was used to perform a time-resolved analysis of dynamic biofouling development on a submerged membrane under continuous operation. A real-time change in the biofouling morphology was calculated through the image analysis of OCT scans. Three videos were generated through the acquisition of serial static images. This is the first study that displays the dynamic biofouling formation process as a video. The acquisition of OCT cross-sectional scans of the biofouling allowed to evaluate the time-lapsed evolution for three different time periods (early stage, double layers and long-term). Firstly, at the early filtration stage, membrane coverage and average biofouling layer thickness were found to be linearly correlated with the permeate flux pattern. Secondly, after 3 d of operation, an anomalous morphology was observed, constituted by a double-layered biofouling structure: denser on the bottom and looser on the top. In a long-term operation, the biofouling structure underwent a dynamic evolution over time, resulting in a multi-layered structure. The biofouling formation information was closely associated with filtration performance (i.e. flux) indicating the suitability of OCT as real-time and in-situ biofouling monitoring technique.Luca FortunatoSanghyun JeongTorOve LeiknesNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Luca Fortunato
Sanghyun Jeong
TorOve Leiknes
Time-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography
description Abstract Biofouling on a membrane leads to significant performance decrease in filtration processes. In this study, an optical coherence tomography (OCT) was used to perform a time-resolved analysis of dynamic biofouling development on a submerged membrane under continuous operation. A real-time change in the biofouling morphology was calculated through the image analysis of OCT scans. Three videos were generated through the acquisition of serial static images. This is the first study that displays the dynamic biofouling formation process as a video. The acquisition of OCT cross-sectional scans of the biofouling allowed to evaluate the time-lapsed evolution for three different time periods (early stage, double layers and long-term). Firstly, at the early filtration stage, membrane coverage and average biofouling layer thickness were found to be linearly correlated with the permeate flux pattern. Secondly, after 3 d of operation, an anomalous morphology was observed, constituted by a double-layered biofouling structure: denser on the bottom and looser on the top. In a long-term operation, the biofouling structure underwent a dynamic evolution over time, resulting in a multi-layered structure. The biofouling formation information was closely associated with filtration performance (i.e. flux) indicating the suitability of OCT as real-time and in-situ biofouling monitoring technique.
format article
author Luca Fortunato
Sanghyun Jeong
TorOve Leiknes
author_facet Luca Fortunato
Sanghyun Jeong
TorOve Leiknes
author_sort Luca Fortunato
title Time-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography
title_short Time-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography
title_full Time-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography
title_fullStr Time-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography
title_full_unstemmed Time-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography
title_sort time-resolved monitoring of biofouling development on a flat sheet membrane using optical coherence tomography
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/6dc1eae0234f4013830b8b0ba8a73c25
work_keys_str_mv AT lucafortunato timeresolvedmonitoringofbiofoulingdevelopmentonaflatsheetmembraneusingopticalcoherencetomography
AT sanghyunjeong timeresolvedmonitoringofbiofoulingdevelopmentonaflatsheetmembraneusingopticalcoherencetomography
AT toroveleiknes timeresolvedmonitoringofbiofoulingdevelopmentonaflatsheetmembraneusingopticalcoherencetomography
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